Where a Business Unit organizes your company or your organization, SetIDs help you organize your data within the system. The HRMS system uses tables (Control Tables or Prompt Tables) that use a high-level key that enables you to identify and retrieve data from the system. A secondary high-level key, referred to as a SetID, has also been added on various tables. SetIDs are simply the labels used to identify a TableSet. Business Unit and SetID functionality in PeopleSoft also provides you with a higher business level for reporting purposes and other business data roll-up.